Thanks for the comments on this topic. I shall read the thread suggest by
Tim and avoid the book. (I did look for reviews on Amazon, but I used
amazon.co.uk, so I missed the Perl book reviews).
I also emailed the company to ask more about the 'Python Certification' that
the book title alluded to;
The listing for the book on Amazon did not have any reviews but they had an
almost identical page for their Perl book. It had 3 reviews giving one star
(the lowest rating) each. All reported that it was just the reproduction of
on-list postings, no original material, and no attempt to make a c
